LXR linux/sound/core/seq/seq

   1/*
   2 *   ALSA sequencer Client Manager
   3 *   Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
   4 *
   5 *
   6 *   This program is free software; you can redistribute it and/or modify
   7 *   it under the terms of the GNU General Public License as published by
   8 *   the Free Software Foundation; either version 2 of the License, or
   9 *   (at your option) any later version.
  10 *
  11 *   This program is distributed in the hope that it will be useful,
  12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *   GNU General Public License for more details.
  15 *
  16 *   You should have received a copy of the GNU General Public License
  17 *   along with this program; if not, write to the Free Software
  18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 *
  20 */
  21#ifndef __SND_SEQ_CLIENTMGR_H
  22#define __SND_SEQ_CLIENTMGR_H
  23
  24#include <sound/seq_kernel.h>
  25#include <linux/bitops.h>
  26#include "seq_fifo.h"
  27#include "seq_ports.h"
  28#include "seq_lock.h"
  29
  30
  31/* client manager */
  32
  33struct snd_seq_user_client {
  34        struct file *file;      /* file struct of client */
  35        /* ... */
  36        
  37        /* fifo */
  38        struct snd_seq_fifo *fifo;      /* queue for incoming events */
  39        int fifo_pool_size;
  40};
  41
  42struct snd_seq_kernel_client {
  43        /* ... */
  44};
  45
  46
  47struct snd_seq_client {
  48        snd_seq_client_type_t type;
  49        unsigned int accept_input: 1,
  50                accept_output: 1;
  51        char name[64];          /* client name */
  52        int number;             /* client number */
  53        unsigned int filter;    /* filter flags */
  54        DECLARE_BITMAP(event_filter, 256);
  55        snd_use_lock_t use_lock;
  56        int event_lost;
  57        /* ports */
  58        int num_ports;          /* number of ports */
  59        struct list_head ports_list_head;
  60        rwlock_t ports_lock;
  61        struct mutex ports_mutex;
  62        int convert32;          /* convert 32->64bit */
  63
  64        /* output pool */
  65        struct snd_seq_pool *pool;              /* memory pool for this client */
  66
  67        union {
  68                struct snd_seq_user_client user;
  69                struct snd_seq_kernel_client kernel;
  70        } data;
  71};
  72
  73/* usage statistics */
  74struct snd_seq_usage {
  75        int cur;
  76        int peak;
  77};
  78
  79
  80int client_init_data(void);
  81int snd_sequencer_device_init(void);
  82void snd_sequencer_device_done(void);
  83
  84/* get locked pointer to client */
  85struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
  86
  87/* unlock pointer to client */
  88#define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
  89
  90/* dispatch event to client(s) */
  91int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
  92
  93/* exported to other modules */
  94int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
  95int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
  96                                           struct file *file, int atomic, int hop);
  97int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
  98int snd_seq_client_notify_subscription(int client, int port,
  99                                       struct snd_seq_port_subscribe *info, int evtype);
 100
 101extern int seq_client_load[15];
 102
 103#endif
 104